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//
// "$Id$"
//
// Scroll bar header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
/* \file
Fl_Scrollbar widget . */
#ifndef Fl_Scrollbar_H
#define Fl_Scrollbar_H
#include "Fl_Slider.H"
/**
The Fl_Scrollbar widget displays a slider with arrow buttons at
the ends of the scrollbar. Clicking on the arrows move up/left and
down/right by linesize(). Scrollbars also accept FL_SHORTCUT events:
the arrows move by linesize(), and vertical scrollbars take Page
Up/Down (they move by the page size minus linesize()) and Home/End
(they jump to the top or bottom).
Scrollbars have step(1) preset (they always return integers). If
desired you can set the step() to non-integer values. You will then
have to use casts to get at the floating-point versions of value()
from Fl_Slider.
\image html scrollbar.png
\image latex scrollbar.png "Fl_Scrollbar" width=4cm
*/
class FL_EXPORT Fl_Scrollbar : public Fl_Slider {
int linesize_;
int pushed_;
static void timeout_cb(void*);
void increment_cb();
protected:
void draw();
public:
Fl_Scrollbar(int X,int Y,int W,int H, const char *L = 0);
~Fl_Scrollbar();
int handle(int);
/**
Gets the integer value (position) of the slider in the scrollbar.
You can get the floating point value with Fl_Slider::value().
\see Fl_Scrollbar::value(int p)
\see Fl_Scrollbar::value(int pos, int size, int first, int total)
*/
int value() const {return int(Fl_Slider::value());}
/**
Sets the value (position) of the slider in the scrollbar.
\see Fl_Scrollbar::value()
\see Fl_Scrollbar::value(int pos, int size, int first, int total)
*/
int value(int p) {return int(Fl_Slider::value((double)p));}
/**
Sets the position, size and range of the slider in the scrollbar.
\param[in] pos position, first line displayed
\param[in] size window size, number of lines displayed
\param[in] first number of first line
\param[in] total total number of lines
You should call this every time your window changes size, your data
changes size, or your scroll position changes (even if in response
to a callback from this scrollbar).
All necessary calls to redraw() are done.
Calls Fl_Slider::scrollvalue(int pos, int size, int first, int total).
*/
int value(int pos, int size, int first, int total) {
return scrollvalue(pos, size, first, total);
}
/**
Get the size of step, in lines, that the arror keys move.
*/
int linesize() const {return linesize_;}
/**
This number controls how big the steps are that the arrow keys do.
In addition page up/down move by the size last sent to value()
minus one linesize(). The default is 16.
*/
void linesize(int i) {linesize_ = i;}
};
#endif
//
// End of "$Id$".
//
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